import { Module } from 'vuex'
import { IRootState } from '../index'
import { toUpperCamelCase } from '@/utils'
export interface ITagsViewState {
  visitedViews: any[]
  cachedViews: any[]
}

export const tagsView: Module<ITagsViewState, IRootState> = {
  namespaced: true,
  state: () => ({
    visitedViews: [],
    cachedViews: [],
  }),
  mutations: {
    ADD_VISITED_VIEW: (state, view) => {
      if (state.visitedViews.some((v) => v.path === view.path)) return
      state.visitedViews.push(
        Object.assign({}, view, {
          title: view.meta.title || 'no-name',
        })
      )
    },
    ADD_CACHED_VIEW: (state, view) => {
      const name = toUpperCamelCase(view.name)
      if (state.cachedViews.includes(name)) return
      if (!view.meta.noCache) {
        state.cachedViews.push(name)
      }
    },

    DEL_VISITED_VIEW: (state, view) => {
      for (const [i, v] of state.visitedViews.entries()) {
        if (v.path === view.path) {
          state.visitedViews.splice(i, 1)
          break
        }
      }
    },
    DEL_CACHED_VIEW: (state, view) => {
      const name = toUpperCamelCase(view.name)
      const index = state.cachedViews.indexOf(name)
      index > -1 && state.cachedViews.splice(index, 1)
    },

    DEL_OTHERS_VISITED_VIEWS: (state, view) => {
      state.visitedViews = state.visitedViews.filter((v) => {
        return v.meta.affix || v.path === view.path
      })
    },
    DEL_OTHERS_CACHED_VIEWS: (state, view) => {
      const name = toUpperCamelCase(view.name)
      const index = state.cachedViews.indexOf(name)
      if (index > -1) {
        state.cachedViews = state.cachedViews.slice(index, index + 1)
      } else {
        // if index = -1, there is no cached tags
        state.cachedViews = []
      }
    },

    DEL_ALL_VISITED_VIEWS: (state) => {
      // keep affix tags
      const affixTags = state.visitedViews.filter((tag) => tag.meta.affix)
      state.visitedViews = affixTags
    },
    DEL_ALL_CACHED_VIEWS: (state) => {
      state.cachedViews = []
    },

    UPDATE_VISITED_VIEW: (state, view) => {
      for (let v of state.visitedViews) {
        if (v.path === view.path) {
          v = Object.assign(v, view)
          break
        }
      }
    },
  },
  actions: {
    addView({ dispatch }, view) {
      dispatch('addVisitedView', view)
      dispatch('addCachedView', view)
    },
    addVisitedView({ commit }, view) {
      commit('ADD_VISITED_VIEW', view)
    },
    addCachedView({ commit }, view) {
      commit('ADD_CACHED_VIEW', view)
    },

    delView({ dispatch, state }, view) {
      return new Promise((resolve) => {
        dispatch('delVisitedView', view)
        dispatch('delCachedView', view)
        resolve({
          visitedViews: [...state.visitedViews],
          cachedViews: [...state.cachedViews],
        })
      })
    },
    delVisitedView({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_VISITED_VIEW', view)
        resolve([...state.visitedViews])
      })
    },
    delCachedView({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_CACHED_VIEW', view)
        resolve([...state.cachedViews])
      })
    },

    delOthersViews({ dispatch, state }, view) {
      return new Promise((resolve) => {
        dispatch('delOthersVisitedViews', view)
        dispatch('delOthersCachedViews', view)
        resolve({
          visitedViews: [...state.visitedViews],
          cachedViews: [...state.cachedViews],
        })
      })
    },
    delOthersVisitedViews({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_OTHERS_VISITED_VIEWS', view)
        resolve([...state.visitedViews])
      })
    },
    delOthersCachedViews({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_OTHERS_CACHED_VIEWS', view)
        resolve([...state.cachedViews])
      })
    },

    delAllViews({ dispatch, state }, view) {
      return new Promise((resolve) => {
        dispatch('delAllVisitedViews', view)
        dispatch('delAllCachedViews', view)
        resolve({
          visitedViews: [...state.visitedViews],
          cachedViews: [...state.cachedViews],
        })
      })
    },
    delAllVisitedViews({ commit, state }) {
      return new Promise((resolve) => {
        commit('DEL_ALL_VISITED_VIEWS')
        resolve([...state.visitedViews])
      })
    },
    delAllCachedViews({ commit, state }) {
      return new Promise((resolve) => {
        commit('DEL_ALL_CACHED_VIEWS')
        resolve([...state.cachedViews])
      })
    },

    updateVisitedView({ commit }, view) {
      commit('UPDATE_VISITED_VIEW', view)
    },
  },
}
